Context
Most global positioning system (GPS) receivers provide NMEA 0183 datagrams containing geographical latitude and longitude
information, as well as current speed and sailed distance. Some GPS systems will also provide the current heading, but this information is normally taken from the gyro.
The communication parameters defined for NMEA 0183 are:
Some instruments may provide other parameters and/or options. You must always check the relevant technical documentation supplied by the manufacturer.